Originally Posted by Gaco
Most online reviewers and really hifi savy people find MPEG4 AVC slightly superior to VC-1. If anybody wants a link or two I can try and dig them up but I consider this more common knowledge.
MPEG4 AVC and VC-1 are virtually the same thing at the bitrates they use on Blu-Ray and HD DVD. Given the same care, there will be no difference between the two. Some editors, such as the inept Dan Ramer of DVDFILE, have made erroneous conclusions on codecs based on completely different movies and genres; comparing the average video review scores of movies like Liar Liar, Daylight, and The Jerk to Pirates of the Carribean and Meet the Robinsons - then blaming the disparity on the codec instead of the master. Pretty laughable stuff, I would pay them no mind. Then of course enthusiasts on various websites who are anti-MS will preach AVC night and day because of their hatred for Microsoft; again, pay them no mind - we are not comparing companies, we are comparing codecs and encoders.
At very low (i.e. 56k modem) bitrates, though, MPEG4 AVC may have an advantage. But that is irrelevant in this discussion.
Another thing to consider is that the Microsoft professional VC-1 encoder is awesome, but it is the only VC-1 encoder that exists so there isn't much choice. There are various AVC encoders and some of them are worse than others. Only a select few come close to the MS VC-1 encoder.